Well, it's nice that you are now an "official" member here!!
I would ask has anyone mentioned Candida to you yet?
I too was infected as a young child. By age 7 I had Rocky Mountain Spotted Fever, age 8 I showed signs of chronic Bartonella, age 9 I had late stage Lyme symptoms - but no one connected the dots, so I was 44 before I was diagnosed with Lyme and company, and 47 before I found a treatment that would work for me. I too have had my gastro system hit pretty hard by these infections, but I did heal!!
I also got reinfected, so I'm back in treatments - but I don't want you to ever believe that it's too late.
So while you may have other things going on as well, I happen to believe that you could easily have Lyme as well (migrating/changing symptoms) and maybe some of the co-infections as well.
Keep searching and asking questions!! Knowledge is power!